I'm trying to telnet my email server on port 25, but I can't open a connection to it. I tried pinging the server and that works fine, my email client also connects to the server. I don't have any anti-virus software and I've disabled my firewall on port 25. I've also tried telneting the other computers on my network, which doesn't work either. Can anyone suggest something I should try?

Are you sure it's using port 25? Try using PuTTY instead of MS Telnet - it's a far superior program.

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